This article discusses the lives of the Catholic Dalit and adivasi communities in India and surveys recent theologies developed in this context. These communities constitute the majority of Catholics in India today, but they have frequently been neglected in theological discussions, and they continue to suffer discrimination both in Indian society and in the Catholic Church. The author reviews a number of interpretations of biblical theology in relation to Dalit experience, as well as the Christology of a pioneering adivasi theologian and a Trinitarian theology developed in relation to adivasi life. The article concludes with reflections of the author on his experiences among the Warli tribe in the northern part of the state of Maharashtra, including local examples of contextualization of Catholic faith